If a country has a large youth population and rising participation in higher education, which demand may increase?

Correct answer: Colleges, universities, and student housing

A large youth population creates demand for services used by young people. If participation in higher education is also rising, more students are likely to seek places beyond school, including colleges, universities, and vocational institutions. These students may also need hostels or other student housing, especially where institutions are far from their homes. The exact level of demand depends on enrolment policies, household income, and available institutions, but the direction of demand follows from the two conditions in the question.

Option A is correct because it links a large potential student population with increasing participation in higher education. Primary schools serve younger children and are not the most direct answer to rising higher-education participation. Pensions and geriatric care mainly respond to an older population, not to a large youth group. The word “only” in the other choices makes them especially unsuitable, since demographic planning generally requires several services rather than one isolated facility.